A 2003 Jeep Liberty uses red, hoat, five year coolant.
coolant you retard not water!!
it uses HOAT coolant. it appears orange in color
this is not an answer just an update. coolant is filled
The bottle on the firewall with the radiator cap on it is where you add coolant.
Most new coolant is tinted red or green. If you have a different color than that look into it a little further. You may have oil in you coolant causing it to be a brown color.
The rear of the generator, right on the manifold
Low coolant and air in the heater core.
Jeep recommends that you use HOAT, or H-OAT coolant. This is an ethylene glycol based coolant that has corrosion inhibitors in it for long radiator life.
The coolant is old, broke down, and needs replaced.
There are several reasons a 2002 Jeep Liberty could overheat. Some possible reasons are low in coolant, a bad thermostat, or the head gasket went bad.
Red, 5 year, HOAT type